I've got an idea for the next shark attack movie. It takes place in the uterus of a grey nurse shark, told from the point of view of shark embryos that are being eaten by other shark embryos.Â And this is actually more realistic thanÂ most shark attack movies.

Australian scientists have been trying to find ways to save the grey nurse sharks from extinction and they're realizing that one of the problems is this intra-uterine cannibalism. As New Scientist reports, "Its embryos have a nasty habit of eating each other in the uterus. Despite starting a pregnancy with up to 40 embryos in her two uteruses, a female shark only gives birth to two pups."

So, a team of scientists in New South Wales plans to raise up to 40 sharks each year by flushing them from the mother's uterus and helping them develop in a test tube.